updated README

Author: kbrannen

86_Target/perl/README.md

@@ -1,3 +1,9 @@
 Original source downloaded [from Vintage Basic](http://www.vintage-basic.net/games.html)
 
 Conversion to [Perl](https://www.perl.org/)
+
+Modified so that if the user enters "quit" or "stop" for the input, the program will exit.
+This way the user doesn't have to enter Contorl-C to quit.
+
+Target values can be space and/or comma separated, so "1 2 3" is valid, as is "1,2,3" or even "1, 2, 3".
+I believe the original Basic program wanted "1,2,3" or else each on a separate line.